<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addRoleDialogVisible = true">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom',i1 === 0 ? 'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过 for 循环 嵌套渲染二级权限 -->
                                <el-row :class="[i2 === 0 ? '':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>


                        <!-- <pre>{{scope.row}}</pre> -->
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index" label="#"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>            
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
                        <el-button size="mini"  type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
                        <el-button size="mini"  type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                     </template>
                </el-table-column>

            </el-table>
        </el-card>
        <!-- 添加角色的对话框 -->
        <el-dialog title="添加角色" :visible.sync="addRoleDialogVisible" width="40%" @close="addRoleDialogClosed">
            <!-- 内容主体区域 -->
            <el-form :model="addRoleForm" :rules="addRoleFormRules" ref="addRoleFormRef" label-width="80px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addRoleDialogVisible = false">取消</el-button>
                <el-button type="primary" @click="addRoles">确定</el-button>
            </span>
        </el-dialog>
        <!-- 编辑角色的对话框 -->
        <el-dialog title="编辑角色" :visible.sync="editRoleDialogVisible" width="40%" @close="editRoleDialogClosed">
            <el-form :model="editRoleForm" :rules="editRoleFormRules" ref="editRoleFormRef" label-width="80px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRoles">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights" >确 定</el-button>
            </span>
        </el-dialog>
    </div>


</template>

<script>
export default {
    data(){
        return{
            //所有角色列表数据
            rolelist:[],
            //控制添加角色对话框的显示与隐藏
            addRoleDialogVisible:false,
            //添加角色的表单数据
            addRoleForm:{},
            //添加角色的表单验证
            addRoleFormRules:{
                roleName:[
                    {required:true,message:'请输入角色名称',trigger:'blur'}
                ],
                roleDesc:[
                    {required:true,message:'请输入角色描述',trigger:'blur'}
                ]
            },
            //控制修改角色对话框的显示与隐藏
            editRoleDialogVisible:false,
            //编辑角色信息
            editRoleForm:{},
            //修改角色的表单验证
            editRoleFormRules:{
                roleName:[
                    {required:true,message:'请输入角色名称',trigger:'blur'}
                ],
                roleDesc:[
                    {required:true,message:'请输入角色描述',trigger:'blur'}
                ]
            },
            //控制分配权限对话框的显示与隐藏
            setRightDialogVisible:false,
            //所有权限的数据
            rightslist:[],
            //树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            //默认选中的节点Id值数组
            defKeys:[],
            //当前即将分配权限的角色id
            roleId:''
        }
    },
    created(){
        this.getRolesList()
    },
    methods:{
        //获取所有角色的列表
        async getRolesList(){
            const {data:res} = await this.$http.get('roles')

            if(res.meta.status !==200) {
                return this.$message.error('获取角色列表失败!')
            }

            this.rolelist=res.data

            console.log(this.rolelist);
        },
        //监听添加角色对话框的关闭事件
        addRoleDialogClosed(){
            this.$refs.addRoleFormRef.resetFields()
        },
        //点击按钮，添加新角色
        addRoles(){
            this.$refs.addRoleFormRef.validate(async valid=>{
                if(!valid) return
                //可以发起添加角色的网络请求
                const {data:res} = await this.$http.post('roles',this.addRoleForm)

                if(res.meta.status !==201){
                    this.$message.error('添加角色失败!')
                }
                this.$message.success('添加角色成功!')
                //隐藏添加角色的对话框
                this.addRoleDialogVisible = false
                //重新获取角色列表数据
                this.getRolesList()
            })
        },
        //展示编辑角色的对话框
        async showEditDialog(id){
            //console.log(id)
            const{data:res} = await this.$http.get('roles/'+id)
            if(res.meta.status !==200)
                return this.$message.error('查询角色信息失败!')
            

            this.editRoleForm = res.data
            this.editRoleDialogVisible=true
        },
        //监听编辑角色对话框的关闭事件
        editRoleDialogClosed(){
            this.$refs.editRoleFormRef.resetFields()
        },
        //修改用户信息并提交
        editRoles(){
            this.$refs.editRoleFormRef.validate(async valid=>{
                if(!valid) return
                //发起修改角色信息的数据请求
                const {data:res} = await this.$http.put('roles/'+this.editRoleForm.roleId,{
                    roleName: this.editRoleForm.roleName,
                    roleDesc: this.editRoleForm.roleDesc
                })

                if(res.meta.status !==200){
                    this.$message.error('更新角色信息失败!')
                }

                //关闭对话框
                this.editRoleDialogVisible = false
                //刷新数据列表
                this.getRolesList()
                //提示修改成功
                this.$message.success('更新角色信息成功!')
            })
        },
        //根据Id删除对应的角色信息
        async removeRoleById(id){
            //弹框询问是否删除数据
            const confirmResult = await this.$confirm('此操作将永久删除该角色，是否继续?','提示',{
                confirmButtonText:'确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err )
            if(confirmResult !== 'confirm'){
                return this.$message.info('已取消删除')
            }

            const {data:res} = await this.$http.delete('roles/'+ id)
            if(res.meta.status !==200){
                return this.$message.error('删除用户失败!')
            }

            this.$message.success('删除用户成功！')
            this.getRolesList()

        },
        //根据Id删除对应的权限
        async removeRightById(role,rightId){
            //弹框提示用户是否要删除
            const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)

            if(confirmResult !== 'confirm'){
                return this.$message.info('取消了删除！')
            }

            const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

            if(res.meta.status !== 200){
                return this.$message.error('删除权限失败!')
            }
            //this.getRolesList()
            role.children = res.data
        },
        //展示分配权限的对话框
        async showSetRightDialog(role){
            this.roleId = role.id
            //获取所有权限的数据
            const {data:res} = await this.$http.get('rights/tree')
            if(res.meta.status!==200){
                return this.$message.error('获取权限数据失败!')
            }
            //把获取到的权限数据保存到 data 中
            this.rightslist = res.data
            console.log(this.rightslist);

            //递归获取三级节点的Id
            this.getLeafKeys(role,this.defKeys)
            this.setRightDialogVisible = true
        },
        //通过递归的形式,获取角色下所有三级权限的id,并保存到 defKeys 数组中
        getLeafKeys(node,arr){
            //如果当前 node 节点不包含 children 属性，则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }

            node.children.forEach(item => this.getLeafKeys(item,arr))
        },
        //监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys = []
        },
        //点击为角色分配权限
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]

            const idStr = keys.join(',')

            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})

            if(res.meta.status !==200){
                return this.$message.error('分配权限失败!')
            }

            this.$message.success('分配权限成功!')

            this.getRolesList()
            this.setRightDialogVisible = false
        }
    }
}
</script>

<style scoped>
    .el-tag{
        margin: 7px;
    }
    .bdtop{
        border-top: 1px solid #eee;
    }
    .bdbottom{
        border-bottom: 1px solid #eee;
    }
    .vcenter{
        display: flex;
        align-items: center;
    }
</style>